Fixing the 2015 A8 overheating issue?
Thread Starter
Instructor
Joined: Jul 2019
Posts: 213
Likes: 38
From: London, UK
Fixing the 2015 A8 overheating issue?
I'm based in the UK, took the car on track last Friday, it can't have been hotter than 70 degrees but I still had overheating issues after 15 mins on track!
I have had this issue a couple of times before, but it was a LOT hotter than that previously, so I wasn't hugely bothered.
But, now I'm keen to get this sorted. What are my options for fixing this? Is it just a case of upgrading a radiator or two? I imagine it's not going to be a cheap fix for me here in the UK but it takes all the fun out of track driving having to worry about this!
I have had this issue a couple of times before, but it was a LOT hotter than that previously, so I wasn't hugely bothered.
But, now I'm keen to get this sorted. What are my options for fixing this? Is it just a case of upgrading a radiator or two? I imagine it's not going to be a cheap fix for me here in the UK but it takes all the fun out of track driving having to worry about this!
Drifting
Joined: Oct 2007
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From: NY
Thread Starter
Instructor
Joined: Jul 2019
Posts: 213
Likes: 38
From: London, UK
Check out this thread:
https://www.corvetteforum.com/forums...solutions.html
https://www.corvetteforum.com/forums...solutions.html
Thank you. A few posts in and clearly this isn't quite a simple as just buying an uprated rad. Damn.
Instructor
Joined: Feb 2023
Posts: 209
Likes: 99
The earlier year models like ours come with a super skinny radiator (38mm if memory serves me correctly), GM upgraded this for later years, so this is an affordable upgrade that was available for free for several years, but now you have to pay this. I went for the Dewitts 70mm, but even this is baby steps, but the rationale was, if I’m going to spend the time changing the rad, why not install the best on the market.
Here in Texas where it doesn’t get very cold, I can reduce the Dexcool to water ratio for better cooling, but in the UK this might not be an option;-).
Look at your intercooler expansion tank, it probably has a lot of air in it? Bleeding this system is advised, it doesn’t stop the engine overheating, but will reduce the engine reducing power due to the supercharger / inlet system temps going too high. Best bet is to build your own vacuum bleed kit, I built one for ~$200.
Last edited by kdochert; Today at 06:04 PM.
